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materials on the properties of porous PTFE-reinforced composite membranes. e m e y composite membranes is measured and discussed to investigate the effect of the biomimetic coating materials on the properties of porous PTFE-reinforced composite membranes. 2. Materials and Methods 2.1. Materials 2.1. Materials AeosTM ePTFE and PTU0214210 PTFE substrates were purchased from Zeus, th Energies 2020, 13, 6101 3 of 14 Sterlitech, USA, respectively. The main physical properties are summarized in Table 1 AeosTM ePTFE and PTUt0r2ih1y4d2r1o0xyPbTeFnEzoiscuabcsidtr(aGteAs),wAePrTeESp,uTrMchPaEsDeAd, farnodmTMZPeDusE,TtAheweUreSAob,tainded from Sig 2. Materials and Methods Sterlitech, USA, respectively.Thheeir mchaeimnicpahl ystsriuccatlurpersoaprersthieoswanriensTuamblem2a.rFizoredpHin8.T5abbulfefe1r,.tTrihzme a3,4h,5y-drochlorid Energies 2020, 13, x FOR PEER REVIEW 3 of 14 substances are discussedtrinihytedrmoxsyboefnwzoaictearcicdo(nGtAac),twAaaPnsTgpElueSr,cohTfaMshePdyEdfDrorAomp, DahnoidnligcTinaMlBlPiyoDtteErceThaACtoew.d,eLrptedo.o,rbSotoauitsnhesKduofbresoatm.rAaSltliegtshmeachAelmdirciaclhs.were used without further purification. and protosunbsctorantedsuancdtivpriotytoTnohcfeoicrnodchmuectmpivoictsyailtoesftrcmuomcetmuporebsistrearmneesmsh.borwAanfetsien.rAwTfataebrlweda2,r.fdFu,oefrulepclHecel8ll.p5pebruffofofremrrma,ntracienzmocfeaohfycdormocphlosritde (Tris-HCl) composite membranwesais pmueracshuaresdedanfdrodmiscDuossnegdintoBiniovteesctihgaCteo.t,hLetedff.,ecStooufttheKboiroemai.mAeltlicthceoacthinegmicals were used as received membranes is measured and discussed to investigate the effect of the biomimetic coating materials on Table 1. Specifications of poly(tetrafluoroethylene) (PTFE) substrates used in this stud Energies 2020, 13, x FOR PEER REVIEW 3 of 14 materials on the properties of porous PTFE-reinforced composite membranes. without further purification. Substrates substrates and proton con2d. MucattievriitaylsoafncdoMmeptohsoidtes membranes. Afterward, fuel cell performance of the properties of porous PTFE-reinforced composite membranes. Zeus AeosTM ePTFE Sterlitech PTU0459010 Table 1. Specifications of poly(tetrafluoroethylene) (PTFE) substrates used in this study. composite mem2b.raMneasteisrmiaelassaunred Manedtdhioscdussed to investigate the effect of the biomimetic coating thickness (m) ~5 ~25 2.1. Materials Zeus Sterlitech materials on the properties of porous PTFE-reinforced composite membranes. porosity (%) ~80 ~60 2.1. MaterialsAeos 2. Materials and Methods 2.1. Materials Aeos was purchased from Dongin Biotech Co., Ltd., South Korea. All the chemicals were used as received Substrates AeosTM ePpToFreEsizPeT(Um0)459010.2‒0.5 0.45 ePTFE and PTU0214210 PTFE substrates were purchased from Zeus, the USA, and TM Sterlitech, USA, respectively. The main physical properties are summarized in Table 1. The 3,4,5- thickness (m) ~5 ~25 AeosTM ePTFE and PTU0214210 PTFE substrates werTeapblue r2c. ChhaesmeidcalfsrtorumctuZreesuofs3,,t4h,5e-trUihySdAro,xaybnednzSoitcearcliidte(GcAh), 3-aminopropyltriethoxy trihydroxybenzoic acid (GA), APTES, TMPEDA, anpdoTrMosPiDtyE(T%A)were obtai~n8e0d from Sigma A~l6d0rich. (APTES), N-[3-(trimethoxysilyl)propyl]ethylenediamine (TMPEDA), and (3- Their chemical structures are shown in Table 2. For pH 8.5 buffer, trizma hydrochloride (Tris-HCl) USA, respectively. The main physical properties aproerseusmizem(amriz) ed in T0.a2b‒l0e.51. The 3,4,05.4-t5rihydroxybenzoic trimethoxysilylpropyl)diethylenetriamine (TMPDETA). acid (GA), APTES, TMPEDA, and TMPDETA were obtained from Sigma Aldrich. Their chemical ePTFE and PTU0214210 PTFE substrates were purchased from Zeus, the USA, and TM Sterlitech,USAs,trreuspcetuctriveeslya.reThsehomwainipnhyTsaibcallep2r.oFpeorrtipesHar8e.5submumffaeri,zterdizimnTaablhey1d.rTohceh3l,o4r,5id-e(Tris-HCl)waspurchased without further purification. Table 2. Chemical structures of 3,4,5-trihydroxybenzoic acid (GA), 3-aminopropyltriethoxysilane ® (APTES), N-[3-(trimethoxysilyl)propyl]ethylenediamine (TMPEDA), and (3- trihydroxybenzoic acid (GA), APTETSa,bTleM1P. SEpDecAifi,catniodnsToMf pPoDly(EteTtrAaflwuoerroetohbylteanien)e(PdTfFrEo)msubSsitgramteas uAsledriincth.is study. from Dongin Biotech Co., Ltd., South Korea. All the chemicals were used as received without trimethoxysilylpropyl)diethylenetriamine (TMPDETA). Their chemical structures are shown in Table 2. For pH 8.5 buffer, trizma hydrochloride (Tris-HCl) further purification. Substrates Zeus Sterlitech was purchased from Dongin Biotech Co., Ltd., South Korea. All the chemicals were used as received without further purification. AeosTM ePTFE PTU0459010 thickness (m) ~5 ~25 Table 1. Specifications of poly(tetrafluoroethylene) (PTFE) substrates used in this study. porosity (%) ~80 ~60 Table 1. Specifications of poly(tetrafluoroethylene) (PTFE) substrates used in this study. pore size (m) 0.2‒0.5 0.45 Substrates Zeus AeosTM ePTFE Sterlitech PTU0459010 Zeus Sterlitech SubTsatbrlaet2et.shCihcekmniceaslst(rμucmtu)res of 3,4,5-trihydro~x5ybenzoic acid (GA), 3-aminoprop~y2ltr5iethoxysilane AeosTM ePTFE PTU0459010 (APTES), N-[3-(trimethoxysilyl)propyl]ethylenediamine (TMPEDA), and (3- porosity (%) ~80 ~60 thickness (m) ~5 ~25 trimethoxysilylpropyl)diethylenetriamine (TMPDETA). pore size (m) 0.2‒0.5 0.45 Table 2. Chemical structures of 3,4,5-trihydroxybenzoic acid (GA), 3-aminopropyltriethoxysilane (APTES), Table 2. ChemicNal-s[t3r-u(ctrtuimreestohfo3x,4y,5si-ltyrilh)ypdroropxylb]enthzyoilcenaceidi(aGmAi)n,e3-(aTmMinPoEpDroApy),ltarniedth(o3x-tyrsiimlaentehoxysilylpropyl)diethylenetriamine (APTES), N-[3-(trimethoxysilyl)propyl]ethylenediamine (TMPEDA), and (3- pore size (μm) 0.2-0.5 porosity (%) ~80 ~60 0.45 (TMPDETA). trimethoxysilylpropyl)diethylenetriamine (TMPDETA). Chemicals GA chemical structure APTES ATS TMPEDA TMPDETA 2.2. Hydrophilic Coating of GA/ATS on PTFE Substrates PTFE substrates were immersed in acetone and ethanol for 6 h, respectively, and then dried in the air prior to hydrophilic treatment. GA of 0.2 g was dissolved in 10 mM Tris-HCl of 100 mL for a GA solution, and three different ATS solutions of 0.13 M using APTES (coded as #1), TMPEDA (coded as #2), and TMPDETA (coded as #3) were prepared in ethanol for ATS solutions. GA/ATS solutions were prepared by mixing 100 mL of the GA solution and 20 mL of the corresponding ATS solution. For the coating of hydrophilic materials, PTFE substrates were immersed in zipper bags filled by the corresponding solutions placed on a plate orbital shaker and were incubated at room temperature for a certain time period under shaking, followed by rinsing with distilled water and drying in the air. The abbreviated incubation conditions are summarized in Table 3.PDF Image | Composite Membranes Using Hydrophilized Porous Substrates
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